Solar-powered outdoor lamp



FIG. 1 is a lower quarter isometric view of the solar-powered outdoor lamp showing my new design;

FIG. 2 is a top plan view on a reduced scale;

FIG. 3 is a right side elevational view on a reduced scale;

FIG. 4 is a left side elevational view on a reduced scale; and,

FIG. 5 is a bottom plan view on a reduced scale.

The broken lines shown form no part of the claimed design. 

The ornamental design for a solar-powered outdoor lamp, as shown and described. 